US 5,344,441 A · Antenna arrangement with supply cable for medical applications

Abstract

The invention discloses an antenna arrangement with a supply line in the form of a coaxial cable arrangement suitable for high frequencies, in particular for medical applications of heat in hollow parts of the body, an extrusion process for the production thereof, a dilatation catheter with the antenna arrangement and a procedure for a dilatation treatment. The coaxial cable arrangement comprises a continuous inner conductor, an insulator arranged cylindrically around the inner conductor, a shielding device applied around the insulator in a first section of the coaxial cable arrangement which begins at the proximal end of the coaxial cable arrangement, a second section beginning at the distal end of the first section of the coaxial cable arrangement and ending at the distal end of the coaxial cable arrangement, said second section serving as an antenna and being designed without an insulator or a shielding device around the continuous inner conductor. The coaxial cable arrangement furthermore comprises a third section which begins at the proximal end of the antenna arrangement and which is shorter than the first section of the coaxial cable arrangement. The third section of the coaxial cable arrangement is more rigid than the other sections, due to the fact that gaps in the knitted, braided or wrapped material of the shielding device are closed by a filling material.

Claims13

Dependent claims

An antenna arrangement with a supply line in the form of a coaxial cable arrangement suitable for high frequencies, for medical applications requiring heat in hollow parts of a patient's body comprising:

(a) a continuous inner conductor identified by three sections wherein a first section is a distal region relative to a user treating a patient and serves as a transmitting antenna, a second section is a proximal region relative to a user treating a patient, and a third section is an intermediate region located between the distal and proximal regions;
(b) an insulator arranged cylindrically around the inner conductor covering the proximal and intermediate regions but does not extend to the distal region which serves as the transmitting antenna;
and
(c) a shielding device applied around the insulator which covers the proximal and intermediate regions, in which the shielding device is selected from the group consisting of knitted metal wire, wrapped metal wire and metal foil and further wherein the shielding device in the proximal region has gaps interspersed within the shielding device which are filled with a conductive reinforcing material which becomes rigid after application.

1 more element

An antenna arrangement with a supply line in the form of a coaxial cable arrangement suitable for high frequencies, for medical applications of heat in hollow parts of a patient's body, comprising:

(a) a continuous inner conductor identified by three sections wherein a first section is a distal region relative to a user treating a patient and serves as a transmitting antenna, a second section is a proximal region relative to a user treating a patient, and a third section is an intermediate region located between the distal and proximal regions;
a first insulator arranged cylindrically around the inner conductor of the proximal region and a second insulator arranged cylindrically around the inner conductor of the intermediate region wherein the first insulator has a mechanical rigidity greater than that of the second insulator;
and
(c) a shielding device applied around the insulators which covers the proximal and intermediate regions, in which the shielding device is selected from the group consisting of knitted metal wire, wrapped metal wire and metal foil.

1 more element

Dependencies are inferred from the claim text.

Antenna arrangement with supply cable for medical applications

Life of this patent

Antenna arrangement with supply cable for medical applications

Life of this patent

Abstract

Claims13